package com.sky.service.impl;

import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppCartService;
import com.sky.utils.CurrentHolderUtil;
import org.apache.commons.lang3.concurrent.ConcurrentUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

/**
 * @Author: XJH
 * @Description: TODO
 * @Date: 2025/6/8 15:59
 * @Version: 1.0
 */
@Service
public class ShoppCartServiceImpl implements ShoppCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper  dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 添加购物车
     * @param shoppingCartDTO
     */
    @Override
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        //判断购物车中是否有该商品
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        Long userId = CurrentHolderUtil.getCurrentId();
        shoppingCart.setUserId(userId);
         List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        //如果有则数量加1，如果没有则添加
        if (list != null && list.size() > 0) {
            ShoppingCart cart = list.get(0);
            cart.setNumber(cart.getNumber() + 1);//数量加1
            shoppingCartMapper.updateNumber(cart);
        }else{
            //如果购物车中没有该商品，则添加
            //判断添加的是菜品还是套餐
            Long dishId = shoppingCartDTO.getDishId();
            if (dishId != null) {
                //添加的是菜品
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
//                shoppingCart.setNumber(1);
//                shoppingCart.setCreateTime(LocalDateTime.now());
            } else {
                //添加的是套餐
                 Long setmealId = shoppingCartDTO.getSetmealId();
                 Setmeal setmeal = setmealMapper.getById(setmealId);
                 shoppingCart.setName(setmeal.getName());
                 shoppingCart.setImage(setmeal.getImage());
                 shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }


    }

    /**
     * 查看购物车
     * @return
     */
    @Override
    public List<ShoppingCart> showShoppingCart() {
        //获取当前用户id
        Long userId = CurrentHolderUtil.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(userId)
                .build();
          List<ShoppingCart> list= shoppingCartMapper.list(shoppingCart);
   return  list;
    }

    /**
     *清空购物车
     * @return
     */
    @Override
    public void cleanShoppingCart() {
        Long userId = CurrentHolderUtil.getCurrentId();
        shoppingCartMapper.deleteByUserId(userId);
    }
    /**
     * 删除购物车中一个商品
     * @param shoppingCartDTO
     */
    @Override
    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {
      ShoppingCart  shoppingCart = new ShoppingCart();
      BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
      //设置查询条件
        Long userId = CurrentHolderUtil.getCurrentId();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if(list!=null&&list.size()>0){
            shoppingCart = list.get(0);
            Integer number = shoppingCart.getNumber();
            if(number==1){
                //当前商品在购物车中的份数为1，直接删除当前记录
                shoppingCartMapper.deleteById(shoppingCart.getId());
            }
            else{
                //当前商品在购物车中的份数不为1，修改份数即可
                 shoppingCart.setNumber(shoppingCart.getNumber()-1);
                shoppingCartMapper.updateNumber(shoppingCart);
            }
        }

    }
}
